Mazdaspeed Forums - CS Turbo exhaust sound

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CS Turbo exhaust sound

Upgraded to the CS turbo over the weekend and now the exhaust is raspier, doesn't have that growl.

I do believe there is an intake leak somewhere as I'm getting high LTFT's at idle.

Aside from that the exhaust sound shouldn't change right? Maybe get louder but not change the tone?

2012 MS3
AT HPFP
HTP 3"
Stratified 3 port
Upgraded map sensor
CPE Catted DP
CS Single exit exhaust
Cobb FMIC
CS turbo on wastegate pressure currently

Maybe you had an exhaust leak or a potential exhaust leak and now the added flow exploited it and/or made it more pronounced.

That would be the first thing I checked.

Quote:

Originally Posted by doctavus (Post 2936631)

If you have checked for exhaust leaks and found none... yes, exhaust sound/tone can change when you switch make/model of turbo... the turbine housing and wastage are different shapes internally, with different acoustic properties. must like replacing the dp or the center tp, resonators... An earlier project car of mine had a TC03 and I put a TC05 on it, it was quieter at idle and significantly louder under load with a much more pronounced whistle...